1037222-96-0Relevant articles and documents
Synthesis, spectroscopy, X-ray structure and redox behaviors of 4-(N-R-salicylideneimine)-2,6-diphenylphenols
Kasumov, Veli T.,Tuerkmen, Hasan,Ucar, Ibrahim,Bulut, Ahmet,Yayli, Nurettin
, p. 60 - 68 (2008)
A series of sterically hindered 4-(N-R-salicylaldimine)-2,6-diphenylphenols (X), where R = H (1), 3-CH3 (2), 5-CH3 (3), 3-OCH3 (4), 4-OCH3 (5), 5-OCH3 (6), 3-tBu (7), 5-tBu (8), 3,5-tBu2(9) and 5,6-benzo(10), were synthesized and their structure as well as redox behavior studied by analytical, spectroscopic [1H, (13C) NMR, IR, UV-vis and mass spectrometry] and cyclic voltammetric (CV) techniques. Single crystal X-ray diffraction studies of 7 evidenced its existence as non-planar enol-imine tautomer structure, in which the phenol ring of the molecule is twisted around C-N single bond by 21.5(2)°. The packing structure of 7 is stabilized by C-H...π(Ph) and O...O and C...O intermolecular short contact interactions. The CV of X display rate is dependent on irreversible and quasi-reversible redox waves in the anodic and cathodic regions due to oxidation and reduction of phenolic and iminic groups, respectively. As evidenced by ESR and UV-vis study, chemical oxidation of X by PbO2 and (NH4)2Ce(NO3)6 in MeCN and CHCl3 generates stable phenoxyl radicals [(g ～ 2.005 and λ ～ 450 nm (1600-8200 M-1 cm-1)].
Synthesis, characterization and catalytic activity of new bis(N-2,6-diphenylphenol-R-salicylaldiminato)Pd(II) complexes in Suzuki-Miyaura and CO2 fixation reactions
Oncel, Nurdal,Kasumov, Veli T.,Sahin, Ertan,Ulusoy, Mahmut
, p. 81 - 90 (2016/04/10)
A series of bulky N-2,6-diphenylphenol-R-salicylaldimines (HLx) and their corresponding bis(N-2,6-diphenylphenol-R-salicylaldiminato)Pd(II) complexes (X), where R = H (1), 3-OCH3 (2), 4-OCH3 (3), 5-OCH3 (4), 3-Me (5), 5-Me (6), 5-C(CH3)3 (7), 3-C(CH3)3 (8) and 3,5-di-C(CH3)3 (9) have been synthesized. Their structures characterized by elemental analyses, IR, UV/vis, 1H NMR and 13C NMR spectroscopic techniques. X-ray crystallography shows that complex 3 crystallizes in the triclinic P-1space group with one trans-[PdL32] molecule and two acetic acid (C2H4O2) molecules in the unit cell. All X compounds are proved to be as efficient homogeneous catalysts for both Suzuki-Miyaura cross-coupling reactions of various aryl bromides and cyclic carbonates synthesis from CO2 and epoxides are reported under appropriate conditions (2 h, 100 °C and 1.6 MPa pressure) without use of phosphine ligands.
